After Porthos catches a life-threatening disease on the Kreetassan homeworld, Archer spends a fretful night in sickbay with Porthos and Dr. Phlox.

Vaughn Armstrong (Kreetassan Captain)

• The Kreetassans are offended this time because Porthos urinated on a sacred tree. Once Archer performs the complicated ritual, they give him three spare plasma injectors.
  
• Vaughn Armstrong, the guest star of a thousand faces, also plays Starfleet Admiral Forrest. Here, he is reprising his role as a Kreetassan, first seen in "Vox Sola".
  
• This episode is often cited when Trek Fanboys give examples of why they hate Star Trek: Enterprise.